Planetary gear



Nov. 8, 1927.

f 1,648,142 R. MATTEUccl PLANETARY GEAR Filed July 15. 192e 5 sheets-Sheen 1 Nm.v s, V1927. 1,648,142

YR. MATTI-:ucm

PLANETARY GEAR 3 Sheets-Sheet 2 Filed July 15. 192s Patented Nov. 8, 1927;

unirse STATES PATENTA oFricE. e

RAFFAELE MATTEUCCI, OF TURIN, ITALY.

PLNETARY GEAR.

Application med July 15, 192e, serial No. 122,657, and in Italy .my 25, 1925.

The present invention relates toplanetary o'ears transmitting mot-ion by action of` adhesion, of the kind comprising a rotary run solid with one of the two transmission s afts, a stationary member consisting of a spllt ring and a set of satellite rollers rolling 1ntermediate' said rim and ring 4on tracks o f the same and engaged in a -arrier which 1s solid Withthe other transmission shaft.

The present invention has for its ob]ect means for exerting'on the ends of said spllt ring the required action to force 1t on said satellite rollers with a controlled pressure securing the requisite adhesion of satellite*` rollers on their tracks, said pressure being distributed in an eveniand uniform manner on the entire extent of contact lines of each satellite roller with its tracks.

`The present invention fully complies with all requirements in respect of the construe tion of planetary gears both in case of light constructions as for aircraft engines, and in the ease of heavier constructions as for steam-turbine speed-reducers, being possible to produce the required action onthe ends of the split ring without producing objection able secondary stresses, and to secure the essential feature of obtaining `an even and uniform' distribution of rolling pressure along the contact lines of each 4satellite roller with its tracks, in spite of inaccuracies in construction of the-pressure regulating device.

On the annexed drawingsr are shown by ivay ot example some embodiments of the present invention, and

Figure 1 is a transverse section ot the en tire planetary gear for purpose of illustration;

Figure 2 is a fragmentary enlarged section of a first embodiment, said section being made on line 2-2 of Fig. 3 in its lett portion and on line Q/-2 of Fig. 3 in its right portion;

Figure 3 is a longitudinal section;

Figure 4 is a horizontal section of a detail;

Figure 5 is a horizontal section of the detail shown in Figure 4; i

Figure G is a horizontal section of a moditication; i

Figure 7 is a transverse `section of the member shown in Figure 6;

Figure 8 is a fragmentary section of a modilication'o'f the gear and Figure 9 is the section of a detail of the same on line 9--9 of Fig. 8;

Figure 10 is a `fragmentary transverse sectionof a further modification;

Figure 11 is a plan section on line 11--11 i' driving shaft 133 thus driving .in rotation the roller carrier 77, in the known manner.

The ring 73 has peripheral grooves 78 on its outer surface, leaving intermediate ribs 7 9 which are eut to a flat surface alonga plane shown by line X-X in F igure 2, and adjacent to. slot 74 in the said ribs and ring body, at the two sides of the .said slot, are Vprovided two holes 80-80 having their central lines lying in a plane Which is tangent or secant with respect to the cylindrical surface ot' the roller track of ring 73.

In grooves 7 8 ot' the ring 73 and at opposite sides with respect to'slot 74;-, are arranged plates 81-31 having noses 82-82' engaging the seats provided by the cooperating holes 80 8`0 in the ring body; the sets of plates Sib-8l engaged with either hole 80-80 are interconnected by a transverse bolt 823-83', reslwctivcly. i

'The two sets ot' plates Sil-'Sl' are inter connected by means efii series of ties 84 arranged intcrmediatc the plates of each set and which bear on the planed surface X-X of ribs 79; the said tics 84 are clamped on the ring 73 by means of transverse bars 88 fastened .on the ring 73 means of screws S9, this interconnection does not affect the deformations ot ring 73 under the action of its energizing device owing to iexibility of screws S9 and to small amplitude of said deformations.

Other means may be provided for clamping said ties and plate sets on lring 73, say parts engaging ring seats 80-S0, and bolts '85--86 interconnecting the plates of each set,

as hereinafter described.'

For the purposeof restrictlng the oscillation of set of plates S1 one of said ties Sei` may have an extension Sel (Fig. 2) embrac- A through large holes 87 of said plates 8l, its

f plates.

knife edge engaging the surface ofthe said plate holes and acting as fulcru'm for said The plates of said' sets engage byA their upl per noses 90-90 plate arms 91-91 which are fulcrume'd on an intermediatemember92.

hereinafter described, and vare 'actuated or energized by springs 93 having 'adjustable and measurable action, each heldinl position bymeans of caps 94-95; caps 94 are each loose ina seat` ofplate-arm 91 on which they abut by Vmeans of collar 96, and each of caps .95 ispsc'rewed in a seatv of plate arm '91 for the spring adjustment; of course a suitable number of springs similar to 93 are used,

each having its ends engaged in caps 94-95 as shown in Figure 3.

'Of course any other arrangement 'of springs ,or any other energizing means as a pressure cylinder or the like may be used Jfor actuating plate-arms 91;-91".

- rIhe outward action of springs 93 or equivalent, means causes the plate-arms-9l--91 y fulcra on the intermediate member 92 and.

`to swing away from each other around their therefore the upper endsof plates 81 are caused to swing outwardly around their ful- Crum 86 which is connected by mean-sof ties 84`withf the bolt 85 on which are pivoted plates 81 .which in turn engage by their lower lnoses 82 the ring seat 80 an-d by their upper vnoses 90 abut on the plate arm 91;

said lower noses- 82-82 of said plates 81-81 thus exert on the ends of t-he split ring 73 an inward-action forcing said ring on the satellite rollers and producing lthe adhesion of said satellite rollers on the vtracks of ring 73 and central rim 76.

To prevent plate-arms 91-91 from float- 'ing lon the noses 90-90 on which they are abutting, one of the plates 8,1 pivoted on .bolt "85 and therefore connected by ties 84 n and screws-89 with ring 73, is extended as `shown in 81 and has two abutments 81 which are at avery short distance from opposite plate-arms 91 at opposite sides with respect to the fulcrum nose 90'; the respec' tive displacements between plate arm'91 and set 4of 'plates 81 are thus restricted the .set of plates 81 being held in position with respect vto ties 84 and ring 73 by means of the Abolt 83 and extension 84 of one of said v ties 84.

For the purpose of compensating for `inaccuracies,- articularly with respect to parallelism of ioles 80-80 providing the seats engaged by noses 82-82 of plates 81-81,

or generally :speaking for securing an even and uniform distribution of the ypressure .of adhesion on the entire extent of the contact linesv of satellite rollers 75 on tracks ef ring 7 3 and rim 6 as required for obtainlng a correct operation of said rollers and. -preventing lobjectionable end thrusts of the same rollers, the member 92 on which the plate arms 91-91 are fulcrumed and which acts as a strut, is arranged to provide for adjustment of the respective distance and di? rection of its knife edges on which plate arms 91-91 are fulcrumed.' In the lconstruction illustrated by way 0f example in Figures 4 and 5, saidstrut com.` prises a body 92 fastened by means of rivets 97 on two s ide plates 98, and said body has a cylindrical surface 99 on one side, while on its opposite side 100 it is flat and sloping;`

on the cylindrical surface 99 of body 92 rests a segment-shaped' member 101 which prof videsa fulcrum knife and is loosely embraced by plates 98 between which it is loosely held by a pin 102 freely passing through an opening 103. The other fulcrum knife 05- 107v engaging the partsl' ing the partsthe loose segment member 101 takes up by itself the required direction by which the'actual Contact of plate arms -91-91along the whole length of the ful HNI Crum-knives of parts 101-104 is obtainedv while bythe manipulation of nut 106 the distance between the lines of contact of said fulcrum knives may be .adjusted and thus the inaccuracies, wear or play of parts, and so on, may be compensated for,- an even action on the whole extent of the lring 73 and therefore on the whole extent of contact lines ofrollers 75 being obtained.

In the middle portion vof the contactinfr surfaces of parts 101-92` 105-104 longltudinal recesses 108 areprovided to cause said parts to contact witheach other along the edges of 'their contacting surfaces at the maximum possible distance from their middle line, yin' order. to prevent them from swinging with respect to each other-and pro# vide afirm abutment of the parts. l l

In order .to provide fora more extensive adjustment of the distance between contact lines of knives 101-104 Without giving. a rtoo high inclination to slope of the adjusting wedge 105, and to provide Afor compensation of inaccuracies, it is useful to insert Aa removable pad `109 between parts and 104; by insertinga pad -having an appropriate thickness the coarseadjustment of thefparts may be made, while. the

ien

fine oricorrect adjustment may be made by means of nut 106 and wedge 105. Of course theladjustment of distance and inclination of fulcrum'ing lines of the memy self-adjusting' bearing means, as pivot-pins,

balls, knives or the like may .be used instead of the described cylindrical bearing surfaces.

Figures 8 and 9 illustrate'a modification in which the adjustable parts are arranged on the plate-arms instead of being-lc lated in the intermediate nlcrnming strut member. l

r In this embodiment plate arm 91 has a cylindrical seat 109 in which is arranged a segment 110 having in its straight edge a recess intended to receive the fu cruming edge of part 92'; the opposite edge of this part is sloping and contacts with a wedge member 105 engaged between `side plates 98 carried by parte92 and having a knife edge entering a straight recess 111 of the plate arm 91', the nut 106 bearing on abutment part` 107 provides for shitting wedge 105 and thus adjusting the distancev between ulcrum lines of plate-arms and intermediate strut.

` In the embodiment of-Figs. 10, 11` 12 and 13 the ends of the split ring 73 at the sides of its slot 7/1 are providedwith seats 30-80- arranged at the sides of the intermediate slot 74, the action line of the pressure regulating device on said ends being thus secant with respect 4to track pravided on ring73. Said seats 8()-`-8() are engaged by Inoses 92-82 of levers 11a-#114 which act directly on the ring ends and are fnlcrumed on knives 115-116 while on their Lipper ends they are engaged by outwardly acting means not shown, as springs, `lever gears, or the like, to force the ring onthc satellite rollers. v y

The levers 114-11-1 are' held in position by means of a frame 117 seated on the ring 73 in such a manner as to Aembrace the portions of the same comprising slot 74.

Said :trame 117 has on its lower surface a y recess 118 in which are located the annular outer ribs 122 of ring 73; Y

In one end of the frame 117 provided a cylindrical scat 119 connected with a square opening 120 while its opposed end has a large screw 121 screwed therein.

ln the cylindrical seat 119, whose central liuc lies in the midddle plane of the ring 73 and is perpendicular to the line connecting the points of action of the noses 82, 82', is seated a. part 123 having a cylindrical surface and provided with the transverse knife 115 and two abutmcnts 12a-A25 parallel with said knife and lying at the op` posits sides with respect to it, to restrict the swinging movements ol arm llet with respect to part 123, for the purpose described in connection with Figures 2 and At the opposite end of the opening 120 is arranged a part 126 engaged by the end of the screw 121 and providing a cylindrical seat 127 similar, to seat 119; in said 4seat 127I is engaged a cylindrical surface member 128 in which a knife 11G 'is provided.

Instead of said cylindrial bearing surl'aces, other suitable Seli-adjusting supporting members or means as pivot pins, balls,-

knives or the like may be used.

Levers 1111 and 114! are located in the opening 120 in order to be able of ya free' adjustment within the same.

The part 123 is engaged in the frame 117 by means of screws 130 and a plate 129 bearing on the ange 131 of said part.

By* this arrangement the lever device is firmly fastened on the ring by effect 0f the engagement o't noses 82-82 of levers 114- 114 in respective seats 80-80 and of notches oflevers 114-111 by knives 1154 110, carried 'by parts 123 and 128 which arecngaged in the frame 117 on the other hand said frame bears on the ring by itsl recessed portion 118 and by its sides it acts to hold in position and guide the ends oi the split ring 73 (Figs. 12 and 13).

The frame 117 may also bea: part of the casing 132 enclosing the planetary gear.

The levers 114-1111 are adapted'to adjust themselves in accordance with the possible respeetive inclination or lack ot' parallelism of seats -80 because fulcruming parts 123 and 128 may rotati` in thea-espective seats, while the support provided by knives 115--116 provides for compensating for inaccuracies dueto lack of parallelism of axes ot' seats 127 and 119; thus an evenly distributed action on thc cntire ext-ent of Contact lines o1" satellite rollers and cooperating tracks is obtained.

(lf course the present invention comprises all modifications ot the described constructions and arrangements lying within the following claims,iand it is only conlincd by appended claims.

What I'claim as my invention and desire to secure by United States Letters Patent is 1. A planetary gear comprising a rim. a split ring. satellite rollers intermediate said rimand ring, a carrier 'for said rollers` means comprising levers and acting on the ends of said split: ring to torce it against raid rollcrs and tulcrum means ior two ot said levers. said fulcrum means comprising means for adjustment of respective directions oi 'ful cruming lines of said levers on said tulcrum means.

with pla'y .2.- A planetary gear comprising'a rimta split ring, satellite rollers .intermediate said riinvand ring, a carrier for said'rollers,v

means comprising levers and acting onzthe ends of said split'ring to force it against said rollers and fulcrum means forftwo of said levers, said fulcrum means comprising means for self adjustment of respective di-f Iections of fulcruming lines of said levers on' said fulcrum means. i 3. A planetary gear comprising a rim, a

if split ring, satellite rollers intermediate said rim and ring, a carrier for said rollers, means,

comprising levers and acting'on the ends of said split ring to force it against said rollers and fulcrum means for two of -said levers, aid ulcrum means comprising meansfor justment4 of respective distance and direcn of the fulcruming lines of said levers n said fulcriim means.

4. A planetary gear coii'iprisingr a rim,a split ring, satellite rollers intermediate said ,rim and ring, a'carrier for said rollersfa "lever device comprising two arm-members acting ontlie ends of said-split ring to force it against said rollers, a fiilcrum `member tor said arm-members comprising means for adjustment of respective distance and'direc-= tion of fulcruming lines .of said arm-mem- -bers on said ulcrum member, and \means 6. A planetary gear comprising a rim, a

split ring, satellite rollers intermediate said rim and' ring, a carrier for said rollers, a

A lever device coin'prisingtwo arm-members, a

fulcrum meinb-er for said arm-members comprising means for adjusting the respective distance `and direction of fulcruming lines of said arni-members Qn said fulcrum member, reversing means intermediate said arm members and split ring ends to force. said split rigig on said rollers and means for energizing said lever device cachof said re'- versing means comprising a set of swinging plates having one end engaged with one of said arm,inembers and theirother end en. 'gaged in a seat of said ends of said split ring, fulcrum and connecting members for said plate sets and tie means interconnecting said fulcrum and,connecting members.

. 7. A planetary gear comprising a rim, a split ring, satellite rollers intermediate said rim andA ring, a carrier for said rollers, a

lever device comprising two arm-members, a ulcrum member for said arm-members comprising .means L,for adjustment of' respective distance and direction of ulcri'iming lines of said arm members o'n said ulcruin member, reversing means intermediate said arm members .and split ring ends to Vforce said v'split ring on said rollers, means for energizing said lever device, each oit said reversing means comprising a set of swinging plates having one of their ends'engaged with in a seat of said ends of said split ring, fulcrumaiid connecting members for said plate sets,tie means interconnecting said ulcrum and connecting members and means engaging `one of said .arms and their other end engaged i y said tie means and fulcriim and connecting l members with said split ring.

8. A- planetary `gear comprising a rim, a

split ring, satellite'rollers intermediate said rim and ring, a carrier for said rollers,l aleverdevice comprising two arm-members, a.

fulcrum member for said arm-members c0mprising means for adjusting the respective distance and direction of fulcruming lines of said arm-members on' said fulcrum meinber, reversing means intermediate saidl armmembers 'and split. ring ends to Kforce said' split ring on said rollers, means `for energizing said lever device, each of said Ireversing means comprising a set of swinging plates having one of their ends engaged `with one of said arms and their other end en'- gaged in a seat of said ends of said split ring, a fulcrum member for oneof said plate sets, a connecting member for the vother vone of said plate-sets, means interconnecting said :ti'ilcrum and connecting members 'and means for restricting the respective floating motion of the second named plate set and its associate armmemben` 9. A planetary gear comprising a rim, aA

Split ring,l satellite rollers intermediate said rim and ring, a carrier forsaid rollers, a lever device comprising two arm-members, a fiilcriim .member for said arm members comprising means for adjusting the respective distance and direction of fulcruming lines 1of said arm-members on said fulcrum member, reversing means intermediate said arm-mem bers and split ring ends toV force said'split ring on said rollers, means for energizing lUU said lever device, each of said reversing means comprising a set of swinging plates having one .of their ends engaged vrwith one of said arms and their other. end engaged in a seat of said ends of said split ring, a fulcrum member for one of said plate sets, a connecting member for the other one of said plate sets, means interconnecting said fulcrumand connecting members and an eX- tension on one of the plates of second named set having abutments for engagement with its associate arm member to restrict the respective floating motion of said second named plate'set and associate arm member.

l0. A planetary gear comprising a rim, a split ring, satellite rollers intermediate said rim and ring, a carrier for said rollers, means comprising levers and acting on the ends of said split ring to force it against said rollers, the line ot action on said split ring ends lying between the centre of said ring and a line tangent to the track of said split ring for said rollers, and a 'ulcrum member for two of said levers, said i'ulcrum member comprising means for adjustment of respective distance and direction of fulcrnming lines of saidlevers on said lulcrum member." I

l1. A planetary gear comprising a rim, a split ring, satellite rollers intermediate said rim and ring, a carrier for said rollers, means comprising leversy and acting on the ends ot' said split riung to force it against said rollers and fulcrum meanst'or two ot said levers, said fulcrum means comprising a part adapted to Swingin the plane lying through fulcruming lines of said levers and` a part adapted to be moved in said plane in -a transverse direction with respect to said,

fulcruming lines, and means for adjustment of the last named part:

l2. A planetary gear comprising a rim, a

split ring, satellite rollers intermediate said rim and ring, a carrierl for said rollers, means comprising levers and acting on the ends of said split ring to torce it against `said rollers and fnlcrum means for two of said levers, said fulcrum means comprising.,y

4a part having a cylindrical-surface portion seated in a cylindrical seat of said means to swing in the plane 'lying through fulcruming lines of said levers, and a part adapted to be moved in said' plane in a transverse direction with respect. Ito said fulcruming lines, and means for adjusting the last. named part. y 13. A planetary geai` comprising a rim, a split ring, satellite rollers intermediate said rim and ring, a carrier for said rollers, means comprising levers and acting on the ends ot' said' split ring to force it against said rollers and fulerum means 'for two of said levers, said fulcrum means comprising a part adaptedto swing in a plane lying through fulcruming lines of said parts and a part adapted to be moved in said plane in a transverse direction with respect to said fuleruming lines, a wedge member cooperating with last named part and a screw member for actuation ot' said wedge member.

la. A planetary gear comprising a rim, a split ring, satellite rollers intermediate said rim and ring, a carrier for said rollers, means comprising levers and acting on the ends of said split ring toV force it against comprising a body portion having side conirim and ring, a carrier for said rollers,

means comprising levers and acting on the ends of said split ring to force itl against said rollers and a. fulcrum means for two ot' said levers, said fulcrum means comprising a part adapted to Swingin a plane lying through fulcruming lines of said levers andA a part adapted to be moved in said plane in a transverse direction with respect to said tulcruming lines, wedge means cooperating with last named part, a removable pad Cooperating with saidlast named part and wedge means and a screw member for actuation of said wedge means.

16. A planetary gear comprising a`rim, a split ring, rollers intermediate saidrim and ring and running on tracks of the same, arms engaging the ends of said ring to force it on saidrollers, means for energizing said arms, a frame member seated on said ring and fulcruming means 'for said arms, said fulcruming means being self-adjustable in said frame member.

17. A planetary gear comprising a rim, a

i8. A planetary gear comprising ay rim, a;

split ring, rollers intermediate said rim and ring and running on tracks of the same, arms engaging the ends of said ring to force it on said rollers, means for energlzing said arms, a"lirame member having recesses, ribs on said ring jt`or engaging said recesses of the frame member, and fulcruming means for said arms. said fulcrmning means being adjust-able and shiftable in said frame, and means for shitting said shiftable means. 19. A planetary gear comprising a rim` split ring, rollers intermediate said rim and ring and runningon tracks of the same, arms engaging the ends of said ring to force it on said rollers, means for energizing said arm's,

a frame member seated on said ring, a mem ber swinging in a cylindrical seat of said frame member and having a fulcrum forone of said arms, a part having a cylindrical ISO 7 seat and adjustable in and along said frame,

` means for adjusting the position 'of the last named-part in said frame, and a part having a' cylindrical surface swingingly seated in said adjustable part seat and providing a fulcrum for the other one of said arms.

20.. A planetary gear comprising a` rim, a

split ring, rollers intermediate-said rim and ring and running on tracks of the same, arms engaging the ends of said ring to force it on said rollers, means for energizing said arms, a frame memberseated on said ring andfulcruining means for saidarms, said fulcruming means being adjustable and shiftable in saidframe member and said frame member being engaged in position on said ring by cooperation of'said arms'and ring ends and fulcruming means..

21. A planetary gear comprising a rim, a split ring, rollers intermediate said rim and ring' and-running on tracks of the same, arms engaging the ends of said ring to -force it on said rollers, means for energizing said arms, a frame member seated on said ring, fulcruming means for said arms mounted in an adjustable and shiftable manner in said frame member and abutments on one of said ulcruming parts for engagement rim 'and ring, a'carrier for vsaid rollers,

with its associate arm to restrict the respective motion of said frame and arm.

22. A planetary gear comprising a rim, a`

split ring, rollers intermediate said rim and ring and running on tracks of the saine, arms engaging .the ends of saidjring to .force it on said rollers, means for energizing said arms,

a frame member seated on said ring and comprising sides acting to guide the ring ends adjacent to ring slot, and fulcruming means for said arms said ulcruming means being adjustable and shiftable in said frame member.

23. A planetary gear comprising arim, a split ring, satellite rollers intermediate said means comprising levers symmetrical with rim and ring, a carrier for said rollers, aA lever device comprising two arm-members,

a ulcruin member for said 'arm-members comprising means for' adjusting the respec tive distance, and direction of ulcruming lines of said arm-inembers on said ulcrum.

member, reversing means intermediate said arm-members and split ring ends to force said split ring on Vsaid rollers, Ameans for energizing said lever device, each ,ofsaid' reversing means comprising. a set of swinging plates having one of their endsy engaged with one of said arms and their other end engaged in a seat of said ends of said s lit ring, a fulcrum member for one of said p ate sets, a fulcrum member and Va connecting member for the other one of said plate sets, means interconnecting plate-set fulcrum-member With said fulcrum said first named member of said second named plate-set,

one of saidinterconnecting .members engaging said connecting member' of said second named plate-set, and an extension on one of the plates of said second-named set said extension having abutments for engagement with the arm-member associate vWith said plate set to .restrict the respective floating motion of said plate sets and associate armmembers.

; In testimony whereof I have Signed my naine to this specification.

' RAFFAELE MATTEUCCI. 

